Chapter 14: Probability Rules!

Question 1

Successive Events

Answer 1

If one happens after the other (i.e. a repeated process)

Question 2

Addition Rule

Answer 2

P(A∪B)=P(A)+P(B)-P(A∩B)

Question 3

Multiplication Counting Principle

Answer 3

To find the total number of ways to do a process, multiply the number of options for each step

Question 4

Factorial (!)

Answer 4

A mathematical operation where you multiply the number and all the positive integers less than that number
n!=n(n-1)(n-2)…2*1

Question 5

Permutation (nPr)

Answer 5

The number of ways to order r items chosen from n total
nPr=n!/(n-r)!

Question 6

Combination (nCr)

Answer 6

The number of ways to choose r items from n total
nCr=n!/[(n-r)!*r!]